Invention Grant
US07388533B2 Multi-bit sigma-delta modulator and digital-to-analog converter with one digital-to-analog capacitor
有权
多位Σ-Δ调制器和具有一个数模转换器的数/模转换器
- Patent Title: Multi-bit sigma-delta modulator and digital-to-analog converter with one digital-to-analog capacitor
- Patent Title (中): 多位Σ-Δ调制器和具有一个数模转换器的数/模转换器
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Application No.: US11588455Application Date: 2006-10-27
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Publication No.: US07388533B2Publication Date: 2008-06-17
- Inventor: Yi Gyeong Kim , Chong Ki Kwon , Jong Dae Kim , Min Hyung Cho , Seung Chul Lee , Gyu Hyun Kim
- Applicant: Yi Gyeong Kim , Chong Ki Kwon , Jong Dae Kim , Min Hyung Cho , Seung Chul Lee , Gyu Hyun Kim
- Applicant Address: KR Daejeon
- Assignee: Electronics and Telecommunications Research Institute
- Current Assignee: Electronics and Telecommunications Research Institute
- Current Assignee Address: KR Daejeon
- Agency: Ladas & Parry LLP
- Priority: KR10-2005-0118141 20051206; KR10-2006-0050320 20060605
- Main IPC: H03M1/82
- IPC: H03M1/82 ; H03M3/00
Abstract:
A digital-to-analog converter (DAC) for a sigma-delta modulator is provided. The DAC has a switched capacitor structure using an operational amplifier (OP amp) and performs a function exceeding 3-level using a switching method employing only one capacitor in single ended form. Thus, DAC non-linearity caused by capacitor mismatching does not occur, and the number of output levels of the DAC is increased. Also, the DAC capacitor may be applied to a general DAC to increase the ratio of DAC output levels to capacitors.
Public/Granted literature
- US20070126615A1 Multi-bit sigma-delta modulator and digital-to-analog converter with one digital-to-analog capacitor Public/Granted day:2007-06-07
Information query
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